Colloid cyst

Case contributed by A.Prof Frank Gaillard

Presentation

Headache

Patient Data

Age: Adult

CT brain

Modality: CT

CT demonstrates an intermediate density spherical structure at the foramen of Monro with obstructive hydrocephalus (note the transependymal oedema). Following administration of contrast, a very thin peripheral enhancement is seen. 

Case Discussion

This case of a colloid cyst demonstrating thin peripheral calcification and thin enhancement with associated hydrocehpalus, is a little unusual, in that typically these cysts are more hyperdense on pre-contrast imaging. The presence of such florid hydrocephalus is also unusual as the majority of these lesions are found incidentally. Typical of lesions which cause hydrocephalus, is the larger size. 

This patient went on to have emergency surgery. 

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Case Information

rID: 5512
Case created: 29th Jan 2009
Last edited: 9th Dec 2015
Inclusion in quiz mode: Included

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